JPS6327027B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field This invention relates to a ball hitting device in an electric pachinko machine.

Prior Art A conventional ball-striking mechanism will be briefly explained with reference to FIGS. 1 and 2. In this ball-striking mechanism, a switching cam 2 is rotated by rotating an operating knob 1 outside the machine frame. , the micro switch 3 is closed by the action of the cam surface 2a of the switching cam 2. When the micro switch 3 is closed, the motor 4 is started and the cam 6 fixed to its drive shaft 5 rotates in the direction of arrow P.

Further, when the operation knob 1 is rotated, the take-up pulley 7 arranged in parallel with the switching cam 2 is rotated, and the interlocking cable 8 whose one end is fixed to the take-up pulley 7 is pulled. It will be done. As a result, the spring 10 interposed between the tip of the interlocking cable 8 and the upper part of the ball hitting rod 9 is pulled in the ball hitting direction.

When the cam 6 rotates, the cam surface 6a causes the connecting shaft 11 supported on the machine frame to rotate intermittently via a cam follower 12 attached to one end of the connecting shaft 11, and an intermediate portion is attached to the other end of the connecting shaft 11. As shown in FIG. 2a, the ball hitting rod 9 to which the ball is attached is rotated in the opposite direction to the ball hitting direction against the tensile force of the spring 10.

When the cam 6 rotates within a certain range, the cam follower 12 rotates on the cam surface 6a, as shown in FIG. 2b.
The ball comes off the batting rod 9 along with the cam follower 12.
is rotated at a high speed in the ball hitting direction by the tension of the spring 10, and the spring-like ball hitting element 9a at the upper end hits the pachinko ball (not shown) on the ball firing rail 13 toward the board surface.

Thereafter, the cam 6 rotates to continuously rotate the cam follower 12 against the bias of the spring 10, so that the ball hitting operation is repeated in the same manner.

However, as shown in FIG. 2A, at position A where the ball batting rod 9 is tilted to the maximum, the tip 6b of the cam 6 has not yet completely separated from the trochanter 12a of the cam follower 12, so the spring 10 is not effective. It does not act on the batting rod 9 as an elastic force. Furthermore, in this state, as shown in FIG. 2b, the cam 6 is
The ball rotates along the circumferential surface of the ball 2a until it reaches position B, where the trochanter 12a has returned to the ball hitting direction by approximately the radius, and starting from the same position B, the elastic force of the spring 10 acts on the ball hitting rod 9. , the batting ball rod 9 suddenly becomes explosive.

Therefore, when a batted ball is fired to a predetermined position by the batting rod 9, a predetermined amount of elasticity for imparting the spring 10 with the elastic force required for the firing, and approximately the radius of the trochanter 12a are required. In addition to the amount of rebound, it is necessary for the ball hitting rod 9 to be rebound by the cam 6 against the spring 10. In this way, the batting rod 9
Since there is a wasted portion between A and B in the amount of elasticity, it was necessary to make the cam 6 larger and the spring 10 stronger by that amount.

Purpose An object of the present invention is to attach a cam that engages with a trochanter on the ball-striking rod side to a drive shaft so that the cam can freely rotate, and that the cam and the drive shaft have a structure that allows the cam to freely rotate within a certain angle range. By providing the idle rotation regulating means, the spring force acts on the batting rod immediately after the batting rod is tilted to the maximum, causing the cam to rotate faster than the rotation of the drive shaft. To provide a ball hitting device for an electric pachinko machine, which can give a sudden springing action to a ball stick, reduce waste of the amount of ball pull, and efficiently make the ball stick bounce.

Embodiment The first embodiment embodying this invention will be described below as the third embodiment.
This will be explained with reference to the drawings and FIG. The ball hitting device according to the present invention is the same as the one shown in FIG. 1 described above except for the cam and its drive shaft, so a description thereof will be omitted.

In this embodiment, the boss portion 6c of the cam 6 is rotatably attached to the drive shaft 5 of the motor 4, and a pair of fan-shaped locking grooves 14 are provided on one side of the boss portion 6c on the drive shaft 5. It is formed symmetrically. This locking groove 14 has a pair of opposing locking surfaces 1.
4a and 14b are formed in the radial direction. or,
A pin 15 is provided at the tip of the drive shaft 5 in both of the locking grooves 1.
It is inserted and fitted so as to protrude between the locking surfaces 14a and 14b of No. 4, and can be engaged with either one of the locking surfaces 14a and 14b. Therefore, the cam 6 can freely rotate with respect to the drive shaft 5 within the range between the locking surfaces 14a and 14b.

Next, the ball hitting action of this embodiment will be explained.

When one locking surface 14a of the locking groove 14 is pushed by the pin 15 of the drive shaft 5 and the cam 6 is rotated together with the drive shaft 5, the cam follower is rotated as shown by the imaginary line in FIG. 12 trochanter 12a moves downward, and the batting rod 9 moves to the maximum tilted position A. In this state, since the trochanter 12a tries to move upward due to the urging force of the spring 10, only the cam 6 moves toward the drive shaft 5 in the direction of the arrow P in FIG. 4, as shown by the solid line in FIG. , and the pin 15 moves from the locking surface 14a of the locking groove 14 to the locking surface 14b.

Therefore, at the same time as the cam 6 starts free rotation, the trochanter 1
2a is allowed to move upward freely, the spring 10 moves from the position A shown by the imaginary line in FIG.
It acts effectively as an elastic force.

On the other hand, when the cam 6 is freely rotated, the pin 15 of the drive shaft 5 approaches the locking surface 14b of the locking groove 14, but as the drive shaft 5 rotates, the pin 15 engages with the locking surface 14a. Then, it rotates together with the drive shaft 5 again.

Furthermore, when the cam 6 rotates in this state and its center of gravity moves from the axis of the drive shaft 5 to the left side of FIG. The pin 15 then engages with the locking surface 14b, and the protruding end 6b of the cam 6 comes into contact with the rotor 12a in the upward movement position. After the cam 6 is temporarily stopped at this position, the pin 15 of the drive shaft 5 is again engaged with the locking surface 14a of the locking groove 14, and the cam 6 and the drive shaft 5 rotate together.

With this rotation, the trochanter 12a is moved downward, and the same operation as described above is repeated.

Other Embodiments Next, a second embodiment will be described with reference to FIG. In this embodiment, a locking member 16 is fixed to the drive shaft 5 by a key 17, and this locking member 1
A pin 18 is provided protruding from one side of 6. Further, a cam 6 is rotatably attached to the drive shaft 5, and a boss portion 6c of the cam 6 is formed with an elongated hole 19 into which the pin 18 is inserted.

Therefore, the cam 6 is connected to the drive shaft 5 through this elongated hole 19.
Free transfer is possible within the range of .

A third embodiment will be described with reference to FIG. In this embodiment, the distal end of the drive shaft 5 is notched in a semicircular shape to form a flat locking surface 20, and the boss portion 6c of the cam 6 has a chevron-shaped locking protrusion 22 on the inner peripheral surface. An idle hole 21 having a diameter is formed. Then, the free rotation hole 21 of the cam 6 is rotatably fitted to the drive shaft 5 such that the locking protrusion 22 of the free rotation hole 21 is fitted into the notch of the drive shaft 5, and this locking Either one of the locking surfaces 23a, 23b on both sides of the protrusion 22 can engage with the locking surface 20 of the drive shaft 5.

Therefore, as the drive shaft 5 rotates, one of the locking surfaces 23a of the locking protrusion 22 is pushed by the locking surface 20 of the drive shaft 5, and the cam 6 rotates together, but at the position shown in FIG. The cam 6 can freely rotate relative to the drive shaft 5 within an allowable space S formed between the locking surface 20 of the drive shaft 5 and the other locking surface 23b of the locking protrusion 22.

A fourth embodiment will be described with reference to FIG. In this embodiment, a locking member 24 is fixed to the drive shaft 5 by a key 25, and a pair of stoppers 26 are provided protruding from the outer periphery at regular intervals. An adjusting screw 27 is screwed into one of the stoppers 26, so that the gap between the inner end of the adjusting screw 27 and the other stopper 26 can be adjusted. or,
A cam 6 is rotatably attached to the drive shaft 5,
A locking protrusion 28 that can be engaged with the inner end of the adjusting screw 27 and one stopper 26 is provided on the boss portion 6c.

Therefore, the cam 6 is connected to the adjusting screw 27 and the stopper 26.
It is possible to freely rotate with respect to the drive shaft 5 within a range between .

Effects As detailed above, in this invention, the cam 6 that engages with the trochanter 12a on the side of the ball hitting rod 9 is rotatably attached to the drive shaft 5, and the cam 6 and the drive shaft 5 are By providing an idle rotation regulating means for restricting the free rotation of the cam 6 within a certain angle range, the elastic force of the spring 10 acts on the batting rod 9 immediately after the batting rod 9 is tilted to the maximum. The cam 6 is rotated faster than the rotation of the drive shaft 5, and as a result, the batting rod 9 is given a rapid springing motion, thereby reducing the wasted amount of rebound and efficiently firing the ball hitting rod 9. It has the effect of making it possible to

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the ball hitting mechanism, Figure 2 a, b
3 is a partial perspective view showing the cam and drive shaft in the first embodiment, FIG. 4 is a front view showing the ball hitting motion in the first embodiment, and FIG. 7 are front views showing a cam and a drive shaft in other embodiments. Drive shaft...5, cam...6, batting rod...9, spring...10, cam follower...12, trochanter...12a, locking groove as free rotation regulating means...1
4, Locking surface...14a, Pin...15, Pin...
18, Long hole...19, Locking surface...20, Locking protrusion...22, Locking surface...23a, 23b, Stopper...26, Adjusting screw...27, Locking protrusion...2
8.

Claims (1)

[Scope of Claims] 1. The ball batting rod 9, which is biased in the direction of hitting the ball by the spring 10, is intermittently swung by the cam 6, which is rotationally driven by the motor 4, so that the ball batting rod 9 is driven to hit the ball. In an electric pachinko machine that uses a batting action, the batting rod 9
A cam 6 that engages with the side trochanter 12a is rotatably attached to the drive shaft 5, and the cam 6 and the drive shaft 5 have an idle restriction mechanism that restricts the idle rotation of the cam 6 to a certain angle range. A ball hitting device for an electric pachinko machine, characterized by being provided with a means. 2 As the idle rotation restricting means, the cam 6 has a locking groove 1 having a pair of opposing locking surfaces 14a and 14b.
4, and the drive shaft 5 has a locking surface 14 that protrudes between the locking surfaces 14a and 14b of the locking groove 14.
A ball hitting device for an electric pachinko machine according to claim 1, further comprising a pin 15 that can be engaged with either one of the pins a and 14b. 3 As the free rotation regulating means, the cam 6 has a long hole 1.
9 , and the drive shaft 5 is provided with a pin 18 that engages in the elongated hole 19 . 4 As the idle rotation regulating means, a locking surface 20 is formed by cutting out a part of the drive shaft 5, and the inner circumferential surface of the idle rotation hole 21 of the cam 6 fitted to the drive shaft 5 is provided with the drive shaft 5. A locking protrusion 22 that is fitted into the notch of the shaft 5 while leaving an allowable space S is provided in a protruding manner. A ball hitting device in an electric pachinko machine according to claim 1, wherein the ball hitting device is adapted to be able to engage with a locking surface 20 of the electric pachinko machine. 5. As the free rotation regulating means, a pair of stoppers 26 are provided on the drive shaft 5 at a constant interval, and an adjusting screw 27 is screwed into one of the stoppers 26,
The cam 6 has an adjusting screw 27 and the other stopper 26.
A ball hitting device for an electric pachinko machine according to claim 1, wherein locking protrusions 28 are provided that can be engaged with each other.